This standard defines the requirements used by the Plan owner to develop a DMSMS Management Plan, hereinafter referred to as the Plan. The requirement to develop a DMSMS Management Plan could come from a number of different sources, such as a contractual or customer requirement or a desire by the Plan owner to document their standard process. The process described in the Plan is intended to mitigate DMSMS risks and resolve DMSMS issues on ADHP equipment provided by the Plan owner. Development of a plan that conforms to the technical requirements detailed in Section 3 ensures that the Plan owner meets the requirement of a DMSMS, or obsolescence management plan, required by industry standards, government regulations, and/or other contractual flow-down requirements, such as: a EIA-STD-4899, Standard for Preparing an Electronic Components Management Plan b AS5553, Counterfeit Electronic Parts; Avoidance, Detection, Mitigation, and Disposition c DFARS 252.246-7007, Contractor Counterfeit Electronic Part Detection and Avoidance System The terms DMSMS and obsolescence are both used in industry and are very similar, though not identical (see 2.3). However, from a process management perspective, obsolescence and DMSMS both contain the same basic elements, as shown in Figure 1, and since this standard focuses on process requirements, in this document the terms are considered interchangeable. This standard was created and is being updated in response to the growing risk that Diminishing Manufacturing Sources and Materials Shortages (DMSMS) poses to the production and support of aerospace equipment.